The idea for this activity is not mine: to the best of my knowledge, it originated in the Mathematics Teacher in 1993. However, whenever I tried to find a copy of it online, I could never find anything I could directly print out to offer to my students.
I created this worksheet so that I'd have something tangible to give to my students. This project's main goal is for students to discover the properties of parallelograms, parallel lines, AIA's, CA's, AEA's, and so on.
Please download the pdf preview file first, so you can see exactly what's included; the product file is a word document, which you may personalize for your students.
Immediately before this worksheet, I use the worksheet named 'Constructions Day 2 Fall 2013' (http://www.teacherspayteachers.com/Product/Constructions-Day-2-Fall-2013-1082528
), and immediately after this worksheet, I use the assessment named 'Geometry Group Practice Test Introductory Material Fall 2013' (http://www.teacherspayteachers.com/Product/Geometry-Group-Practice-Test-Introductory-Material-Fall-2013-1269942